Glucose EAQs Practice Test

How should insulin be stored for best quality and effectiveness?

Store all insulin in the freezer at all times Store unopened vials in the refrigerator; once opened, at room temperature Store opened vials in the freezer Store in direct sunlight at room temperature

Correct Answer:

Store unopened vials in the refrigerator; once opened, at room temperature

Explanation:

Insulin stability hinges on storage conditions. It’s a protein, so heat, light, and freezing can break it down and reduce effectiveness. Keeping unopened vials refrigerated slows any chemical changes and preserves potency until the product’s expiration. Once a vial is opened, it should be kept at room temperature to avoid injecting cold insulin and to maintain its effectiveness for the usable period of time defined by the product’s guidelines (often about a month for many insulins). Avoid freezing insulin and exposing it to direct sunlight or high heat, as those conditions accelerate degradation. This approach protects insulin quality throughout its use.

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